Surface relaxation behavior in cyclic polystyrene films

Yoshihisa Fujii, Kazuhiro Koguchi, Keiji Tanaka, Toshihiko Nagamura, Atsushi Takano, Yushu Matsushita, Tisato Kajiyama

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    Well-defined cyclic polystyrenes (c-PS) with various molecular masses were prepared by the reaction of linear polystyrene with two end vinyl groups and potassium naphthalenide as a coupling agent. Then, surface relaxation behavior in c-PS films was examined by lateral force microscopy (LFM). The αa-relaxation process corresponding to the segmental motion was clearly observed at the surface in the c-PS films. Surface glass transition temperature so obtained was approximately 300 K, which was lower than the bulk value, and was independent of the molecular weight due to the absence of chain ends. The results indicate that the molecular motion at the polystyrene surface is activated by not only chain ends but also other factors.

    Original languageEnglish
    Title of host publication54th SPSJ Annual Meeting 2005 - Polymer Preprints, Japan
    Number of pages1
    Publication statusPublished - 2005
    Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
    Duration: May 25 2005May 27 2005


    Other54th SPSJ Annual Meeting 2005

    All Science Journal Classification (ASJC) codes

    • Engineering(all)


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